FATIGUE BEHAVIOR OF FINE-GRAINED 2-PHASE ALLOYS

被引：18

作者：

HAYDEN, HW ^{[1
]}

FLOREEN, S ^{[1
]}

机构：

[1] INT NICKEL CO INC,PAUL D MERICA RES LAB,SUFFERN,NY 10901

来源：

METALLURGICAL TRANSACTIONS | 1973年 / 4卷 / 02期

关键词：

D O I：

10.1007/BF02648710

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Five series of ultrafine grained two-phase alloys were investigated; viz, austenite-ferrite stainless steel compositions, martensite-ferrite stainless steel compositions, and Fe-Cu tie-line series, Ni-Cr binary alloys, and commerical IN-744 stainless steel. The fatigue strengths of the two-phase microduplex alloys were generally higher than those of the corresponding single phase alloys. Tension-compression fatigue tests showed that a Coffin law type of fatigue relationship was obeyed in the low-cycle fatigue tests. Fatigue crack growth rate studies in tension-tension on IN-744 sheet gave results very comparable to those reported for other steels. Fatigue cracks propagated through both phases without following any obvious crack paths, and no indication of delamination or crack blunting was detected. The high-cycle fatigue performance of microduplex alloys can be rationalized in terms of a critical crack opening displacement model for fatigue crack initiation.

引用

页码：561 / 568

页数：8

共 14 条

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